CURRENT SPLIT CIRCUIT FOR EQUALLY SPLITTING CURRENT BETWEEN PARALLEL CONNECTED LED LUMINAIRE STRINGS

摘要

A system and method for equally splitting the current supplied to parallel connected strings of LEDs. The system and method includes a current splitting circuit such as a mirror circuit that divides the current substantially equally between two or more parallel connected strings of LEDs. The current splitting circuit ensures that illumination levels of the strings of LEDs are uniform without requiring the strings of LEDs to be binned. The current splitting circuit also allows the strings of LEDs to be dimmed in both pulse width modulation (PWM) and continuous modes.

主权项

1. A lighting circuit, comprising:
a first string of solid state lighting devices in communication with a power source, the first string of solid state lighting devices being connected in series with each other; a second string of solid state light devices in communication with the power source, the second string of solid state light devices being connected in series with each other, the first and second string of solid state lighting devices being connected in parallel; and a current split circuit in communication with the first and string of solid state lighting devices.